Excel 10 W7763C,D,E CHILLED CEILING CONTROLLERS LNS PLUG-INS

Transcription

1 Excel W7763C,D,E CHILLED CEILING CONTROLLERS LNS PLUG-INS HONEYWELL EXCEL 5 OPEN SYSTEM USER GUIDE CONTENTS Introduction... Description of Devices... Products Covered... Organization of Manual... Applicable Literature... Product Names... Control Application... 3 Control Provided... 3 Setpoints... 4 Bypass... 5 LED/LCD... 5 Energy-Saving Features... 5 Occupancy Status... 6 Condensation Protection... 6 Operating Modes... 7 Agency Listings... 8 Construction... 8 Controllers... 8 Controller Performance Specifications... 9 Configurations... General... Type of Heating and Cooling Equipment... Digital Input... Excel Wall Module Options... Abbreviations and Definitions... Application Steps... 3 Overview... 3 Step. Plan The System... 3 Step. Determine Other Bus Devices Required... 3 Step 3. Lay Out Communications and Power Wiring... 4 LonWorks Layout... 4 Power Wiring... 6 Step 4. Prepare Wiring Diagrams... 7 General Considerations... 7 W7763 Controller... 8 LonWorks Termination Module... 9 Step 5. Order Equipment... Step 6. Plug-Ins Configuration Screens... General... Output... Input... 3 Equipment Control... 4 Switching Levels... 4 Zone Options... 5 Miscellaneous... 5 PID... 6 Commissioning... 6 ID Number... 6 Step 7. Troubleshooting... 7 Troubleshooting Excel Chilled Ceiling Controllers and Wall Modules... 7 U.S. Registered Trademark r93 Copyright 3 Honeywell Inc. All Rights Reserved

2 EXCEL CHILLED CEILING CONTROLLER LNS-PLUG-INS - USER GUIDE Alarms... 7 Broadcasting the Service Message... 9 W7763 Controller Status LED... 9 Manual Mode... 9 Appendix A: Using A LNS tool to commission a Chilled Ceiling Controller... 3 Temperature Sensor Calibration... 3 Appendix B: Configuring for Master/Slave Operation... 3 Output Configuration Options... 3 Input Configuration Options... 3 Equipment Control Options... 3 Zone Control Options... 3 Network Variable Binding... 3 Appendix C: LON Interface r93

3 EXCEL CHILLED CEILING CONTROLLER LNS-PLUGINS - USER GUIDE INTRODUCTION Description of Devices The W7763C, D and E Controllers are three Chilled Ceiling Controllers in the Excel family product line. They cover a wide range of control applications including radiators, induction units, chilled ceiling, and chilled beam and are suitable for either wall mounting or unit mounting. Heating systems can be water or electric, and cooling systems can be chilled water supply or compressors. Extensive timing features make the W7763 especially suitable for systems using electric heat and compressors. The W7763 Controllers are capable of stand-alone operation; however, optimum functional benefits are achieved when the network communication capabilities are used. The zone controlled by the W7763 Controller will typically use an Excel wall module with a temperature sensor for space temperature measurement, setpoint adjustment, bypass push-button, status LED, and LCD display. See page for form numbers of Excel wall module literature for further information. Fig. shows an overview of a typical system layout. EXCEL CHILLED CEILING CONTROLLER Fig.. Typical system overview r93

4 EXCEL CHILLED CEILING CONTROLLER LNS-PLUG-INS - USER GUIDE Products Covered This User Guide describes how to apply the Excel Chilled Ceiling Controller and the accessories to typical Chilled Ceiling applications. The specific devices covered include: W7763C, D and E Chilled Ceiling Controllers. T746 Wall Modules. T756 Wall Modules. Organization of Manual The Introduction and Application Steps through 5 provide the information needed to make accurate ordering decisions. Application Step 6 and the Appendices include configuration engineering that can be started using a LNS tool after the devices and accessories are ordered. Application Step 7 is troubleshooting. Information provided in support of the use of third-party LONWORKS communication packages to configure Chilled Ceiling Controllers is found in the Appendices. The organization of the manual assumes a project is being engineered from start to finish. If you are adding to, or changing an existing system, the Table of Contents can guide you to the relevant information. Applicable Literature The following is a list of documents that contains information related to the Excel Chilled Ceiling Controller and the EXCEL 5 System in general. prod. lit. no. title Excel W7763C,D,E Chilled Ceiling Controller - Specification Data Excel W7763C,D,E Chilled Ceiling Controller - Installation Instructions Excel T746 Wall Modules - Specification Data Excel T746 Wall Modules - Installation Instructions Excel T756 Wall Modules - Specification Data Excel T756 Wall Modules - Installation Instructions Excel T777 Wall Modules - Specification Data Excel T777 Wall Modules - Installation Instructions Excel Q775A, Excel Zone Manager - Specification Data Excel Q775A Excel Zone Manager - Checkout and Test Manual Excel Q775A Zone Manager - Installation Instructions Excel FTT/LPT 954B Termination Module - Installation Instructions Excel Q775A Router - Installation Instructions Excel Q775A Serial Interface - Installation Instructions XBS User s Manual XBS Application Guide Product Names The W7763 Controller is available in three models: W7763C Chilled Ceiling Controller with integral setpoint adjustment, temperature sensor, and bypass push-button. W7763D Chilled Ceiling Controller with integral setpoint adjustment only. W7763E Chilled Ceiling Controller with no integral setpoint adjustment, sensor, or bypass push-button. The W7763 Chilled Ceiling Controllers can use any of the following Wall Modules: T746A with temperature sensor. T746B with temperature sensor and setpoint adjustment. T746C with temperature sensor, setpoint adjustment, and bypass button and LED. T777A Wall Module with temperature sensor and optional E-Bus jack. T777B Wall Module with temperature sensor, setpoint adjustment, and E-Bus jack. T777C Wall Module with temperature sensor, setpoint adjustment, bypass button and LED, and E-Bus jack. T777D Wall Module with temperature sensor, bypass button and LED, and E-Bus jack. Other products: Q775A Excel Zone Manager. Q775A Bus Router (US only). Q775A Serial Adapter (US only). AK378 E-Bus (non-plenum): AWG (.35 mm ) twisted pair solid conductor, non-shielded wire (one twisted pair) (US only). AK378 E-Bus (non-plenum): AWG (.35 mm ) twisted pair solid conductor, non-shielded wire (two twisted pairs) (US only). AK379 E-Bus (plenum): AWG (.35 mm ) twisted pair solid conductor, non-shielded wire (one twisted pair) (US only). AK379 E-Bus (plenum): AWG (.35 mm ) twisted pair solid conductor, non-shielded wire (two twisted pairs) (US only). C768A Return Air Sensor (Europe only). VFA Strap-on Temperature Sensor (Europe only) r93

5 EXCEL CHILLED CEILING CONTROLLER LNS-PLUGINS - USER GUIDE Control Application Chilled Ceiling systems in commercial buildings control room temperature through the control of heat and/or cold water valves. W7763 Chilled Ceiling Controllers cover a wide range of applications including radiators, induction units, chilled ceiling and chilled beam, and fan coil units. The Chilled Ceiling controller is typically connected to an Excel wall module which incorporates a temperature sensor, setpoint and a bypass or override button. Connection of a humidity sensor and chilled water temperature sensor allow calculation of the dewpoint for condensation prevention. Fig. shows a typical Chilled Ceiling control application. W7763E CHILLED CEILING CONTROLLER CHILLED WATER TEMP SENSOR WINDOW CONTACT WALL MODULE WITH TEMP SENSOR HUMIDITY SENSOR LonWorks LonWorks Digital wall module T756B has internal humidity sensor. Fig.. Typical W7763 Chilled Ceiling control application. Control Provided The basic control sequence for a W7763 Chilled Ceiling Controller is shown in Fig. 3. As space temperature falls below the heating setpoint, the heating output is increased. As space temperature increases above the cooling setpoint, the cooling output is modulated to %. Switching levels for staged heating/cooling are configurable. W7763 Chilled Ceiling Controllers use a PID control algorithm where each of the three parameters can be configured. There are additional configurable boost parameters (HeatBoost and CoolBoost) which specify a range outside of which the heating or cooling outputs are turned on fully for faster response (for thermal actuators this specifies the control hysteresis). The controllers are delivered with factory defaults for each of the parameters. Fig. 3. Control sequence diagram r93

6 EXCEL CHILLED CEILING CONTROLLER LNS-PLUG-INS - USER GUIDE Setpoints Setpoint Knob W7763C and D Chilled Ceiling Controllers have a built-in setpoint potentiometer. W7763E controllers may have an Excel wall module with setpoint potentiometer connected to them. When configured setpoint knob, the value from the setpoint knob is used to calculate the Cooling or Heating Occupied Setpoint. There are two options that determine how the setpoint to be used by the control algorithm is calculated: Relative (or Offset) and Absolute Middle. When configured for Relative, the Wall Module setpoint knob represents a number from -5 to +5 C (-9 to +9 F) which is added to the software occupied setpoints for the heat and the cool modes (Cooling Occupied Setpoint and Heating Occupied Setpoint). When SptKnob is set to Absolute Middle, the setpoint knob becomes the center of the Zero Energy Band (ZEB) between the cooling and heating occupied setpoints. The range of the ZEB is found by taking the difference between the configured heating and cooling occupied setpoints; therefore, for Absolute Middle, the actual setpoints are found as follows: nvoactivesetpt (in cooling mode) = nvosensor.remote_set_point+ (Cooling Occupied Setpoint - Heating Occupied Setpoint) / nvoactivesetpt (in heating mode) = SrcRmTempSptHw - (Cooling Occupied Setpoint - Heating Occupied Setpoint) / During Standby and Unoccupied modes, the remote setpoint knob is ignored, and the configured setpoints for those modes are used instead. Setpoint Limits Setpoint knob limits are provided by Minimum Limit Setpoint Pot and Maximum Limit Setpoint Pot. The occupied setpoints used in the control algorithms are limited by these parameters. When the setpoint knob is configured to be Absolute Middle, the lowest actual setpoint allowed is equal to Minimum Limit Setpoint Pot, and the highest actual setpoint allowed is equal to Maximum Limit Setpoint Pot. When the setpoint knob is configured to be Relative, the lowest actual setpoint allowed is equal to Heating Occupied Setpoint - Minimum Limit Setpoint Pot, and the highest allowed is equal to Cooling Occupied Setpoint + Maximum Limit Setpoint Pot. Setpoint from Network When not configured to use the wall module, nvisetpt must be bound to another node that provides a setpoint. When bound and a valid update is received, nvisetptis used with the appropriate ZEB: ZEBoccupied = Cooling Occupied Setpoint - Heating Occupied Setpoint ZEBstandby = Cooling Standby Setpoint- Heating Standby Setpoint The Unoccupied setpoint does not depend on nvisetpt at all. Setpoint Offset Third party nodes may be bound to nvisetptoffset to shift the setpoint in the range of - delta C to + delta C. Occupancy Mode Table. Example setpoint values based upon default configuration - Absolute Middle setpoint knob ( C). Configured Cooling Spt. Configured Heating Spt. ZEB Setpoint Knob Effective Cooling Spt.,3 Occupied 3 Standby Unoccupied 8 6 X 8 6 NOTES:. Sample value shown. Limited by default configuration settings to the range of to 3 C.. Limited to the range of to 35 C. 3. = Setpoint Knob + (ZEB/) 4. = Setpoint Knob (ZEB/) Effective Heating Spt.,4 Occupancy Mode Table. Example setpoint values based upon default configuration - Relative setpoint knob ( C). Configured Cooling Spt. Configured Heating Spt. ZEB Setpoint Knob Effective Cooling Spt.,3 Occupied 3-9 Standby Unoccupied 8 6 X 8 6 NOTES:. Sample value shown. Limited by default configuration settings to the range of -5 to 5 C.. Limited to the range of to 35 C. 3. = Configured Cooling Setpoint + Setpoint Knob 4. = Configured Heating Setpoint + Setpoint Knob Effective Heating Spt., r93 4

7 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Bypass Bypass Mode During Unoccupied periods, the bypass push-button (either on the controller itself or on the Wall Module) may be used to cause the Occupied setpoints to be used by the control algorithm. The mode may also be initiated by setting nvimanocccmd to OC_BYPASS via the network The controller remains in Bypass mode until:. The bypass timer has timed out, or. The user again presses the Wall Module push-button to cancel Bypass mode, or 3. The occupancy schedule (nvitodevent network input) switches the mode to Occupied. 4. The network input nvimanocccmd is set to to OC_NUL. The LED on the Wall Module indicates the current bypass mode status (see Wall Module Status LED section). Bypass Timer When the bypass mode has been activated, the bypass timer is set to BypTime (default of 8 minutes), at the end of which the mode reverts to the original occupancy state. See also Wall Module Bypass push-button section. Continuous Unoccupied Mode This mode is entered when a wall module is configured to allow it and the bypass button is pressed for four to seven seconds. This mode can also be entered via a network command (nvimanocccmd set to OC_UNOCCUPIED). The controller uses the Unoccupied setpoints. The controller remains in this mode indefinitely, or until the bypass button is pressed to exit the mode, or a network command is sent to clear the mode. Bypass Push-Button W7763C Chilled Ceiling Controllers have a built-in bypass push-button. W7763D and E controllers may have an Excel wall module with bypass push-button connected to them. There are three ways to configure the bypass pushbutton (see Table 5 for further information): NONE BYPASS_UNOCCUPIED BYPASS_ONLY Override Priority The Chilled Ceiling controller can be configured to arbitrate overrides coming from the bypass push-button and the network. There are two possible states which have the following meanings: LAST_WINS-Specifies that the last command received from either the wall module or nvimanocccmd determines the effective override state. NETWORK_WINS-Specifies that when nvimanocccmd is not OC_NUL, then the effective occupancy is nvimanocccmd regardless of the wall module override state. LED/LCD LED Override The wall module s LED shows the override from the bypass button or from the network. LED on Override Bypass One flash per second Override Unoccupied Two flashes per second Override Standby or Occupied LED off No Override Four flashes per second Controller answers network management wink command. LED Occupancy The wall module s LED shows the effective occupancy mode. LED on Effective Occupied or Bypass One flash per second Effective Standby LED off Effective Unoccupied Four flashes per second Controller answers network management wink command. LCD Display This mode is only used for T756 Wall Modules. The occupancy mode is represented by the following symbols: Effective Occupied or Bypass Effective Standby Effective Unoccupied Controller is off and Controller is off, frost protection is enabled. Flashing symbols represent the Override mode: Override Occupied or Bypass Override Standby Override Unoccupied Controller answers the network management wink command. Energy-Saving Features Standby Mode The digital input for an occupancy sensor (usually a motion detector) provides the controller with a means to enter an energy-saving Standby mode whenever there are no people in the room. Standby mode occurs when the scheduled occupancy is Occupied and the occupancy sensor indicates no people currently in the room. If no occupancy sensor is connected directly to the controller, an occupancy sensor from another node may be bound to the network input DestOccSensor. The controller can also be put in Standby mode by setting nvimanocccmd to OC_STANDBY via the network. When in Standby mode, the W7763 uses the Standby Cooling or Heating setpoint (SptCoolStby or SptHeatStby). Window Sensor The digital input for a window contact provides the algorithm with a means to disable its temperature control activities if someone has opened a window or door in the room. If no window sensor is connected to the controller, the sensor from another node may used by binding it to nviwindow. Frost protection remains active (controller enables heating circuit with room temperatures below 46 F (8 C)). Normal temperature control resumes when the window closes r93

8 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Demand Limit Control When a high-electrical-demand signal is received from an energy management system via the LONWORKS network (nvidlcshed), the controller uses Demand Limit Control Bump to shift the current setpoint (down for heating and up for cooling) by the configured value to save energy. Optimum Start Gradients There are two parameters, Cool Rec Ramp and Heat Rec Ramp, that can be configured to cause the cooling and heating setpoints respectively to ramp up to their Occupied settings from their Unoccupied or Standby settings prior to scheduled Occupancy. The Chilled Ceiling controller uses the configured rates to determine the optimum time to start increasing the heating or cooling demand. See the following figures. The configuration parameters are in K/hour. Fig. 4. Optimum start - heating. Fig. 5. Optimum start - cooling. Occupancy Status The occupancy status is determined based upon the following table. Manual override may come from the network input nvimanocccmd or from the bypass push-button. Table 3. Effective Occupancy Mode Arbitration Scheduled occupancy mode Occupancy sensor status Manual override status Effective operating mode Occupied Occupied Not assigned OC_OCCUPIED Occupied Not occupied Not assigned OC_STANDBY X X Occupied OC_OCCUPIED X X Unoccupied OC_UNOCCUPIED X X Standby OC_STANDBY Occupied X Bypass OC_OCCUPIED Standby X Not assigned OC_STANDBY Standby X Bypass OC_OCCUPIED Unoccupied X Not assigned OC_UNOCCUPIED Unoccupied X Bypass OC_BYPASS X=Don't care Condensation Protection W7763 Chilled Ceiling Controllers have several possibilities for protection from condensation, using a calculated or configured dewpoint and/or condensation switch. Dewpoint Calculation If the controller has humidity and chilled water inputs, either directly connected or from the network, it will actively calculate the dewpoint based upon room temperature and humidity. If configured to do so, the controller will close the cooling valve and issue an alarm if the chilled water temperature drops below the dewpoint plus a configurable safety band. If no humidity input is available, the controller will use a fixed configured dewpoint. Condensation Switch The digital input can be configured for a condensation switch which will close the cooling valve when condensation is detected. This feature is independent of the comparison of the chilled water temperature to the dewpoint and remains active even if the dewpoint protection is disabled r93 6

9 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Operating Modes The possible modes of operation are listed in Table 4. Table 4. Modes of Operation for Excel Chilled Ceiling Controller. Mode Description Events Causing a Controller to Switch to This Mode Operational Modes (NV Reference) START-UP AND WAIT FLOATING OUTPUTS SYNCH COOLING HEATING MANUAL FACTORY TEST DISABLED Control algorithms are disabled. Outputs stay in their initial positions. Physical inputs are periodically read and digital filtering of analog inputs is turned off to speed up settling time. Network input variables are received and output variables are sent periodically. The Chilled Ceiling Controller drives the floating control valves to their initial positions and then transitions to one of the control modes. The Excel Chilled Ceiling Controller is controlling in the Cooling mode. The Excel Chilled Ceiling Controller is controlling in the Heating mode. No control algorithms are active. Physical inputs are periodically read and digital filtering of analog inputs is turned off to speed up settling time. Network input variables are received and output variables are sent periodically Outputs may be turned on or off by settings in network input nvitest. Control algorithm is disabled; special factory test program runs. Control algorithms are terminated, outputs are turned off (turn-off sequences are active). Frost protection is disabled. This is the first mode after an application restart. When the effective occupancy changes to unoccupied or standby, after start-up or 4 hours have elapsed since the last start-up, the Chilled Ceiling Controller transitions to this mode.. Network input (nviapplicmode) has a value of HVAC_COOL or HVAC_AUTO and the space temperature is above the cooling setpoint. Network input (nviapplicmode) has the value of HVAC_HEAT or HVAC_AUTO and the space temperature is below the heating setpoint.. Network input (nvimanualmode) has value of MODE_MANUAL. This mode is for factory testing only. Network input (nvimanualmode) has a value of MODE_DISABLED r93

10 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Agency Listings Table 5 provides information on agency listings for Excel Chilled Ceiling Controller products. Table 5. Agency listings. device agency comments W7763 Chilled Ceiling Controller CE FCC General Immunity per European Consortium standards EN58- (CISPR Class B) and EN 58-:99 (based on Residential, Commercial, and Light Industrial). EN 6-4- IEC -4- (IEC 8-) Electromagnetic Discharge. EN 54, EN 54 IEC -4-3 (IEC 8-3) Radiated Electromagnetic Field. EN IEC -4-4 (IEC 8-4) Electrical Fast Transient (Burst). Radiated Emissions and Conducted Emissions. EN 55:987 Class B. CISPR-: 985. Complies with requirements in FCC Part 5 rules for a Class B Computing Device. Construction Controllers The Excel W7763 Chilled Ceiling Controller is available in three basic models. The W7763C and D have a built-in setpoint adjustment knob, available in relative or absolute (degrees C or degrees F) scales. The W7763C also has a temperature sensor and bypass push-button and LED. The W7763E has no built-in setpoint adjustment, temperature sensor or bypass push-button, and as such requires setpoint and temperature inputs either from a direct-connected wall module or from the LONWORKS network. All of the controllers are powered by 4 Vac. All wiring connections to the controllers are made at screw terminal blocks accessible beneath a plastic safety cover. Mounting dimensions are shown in Fig. 6. CAUTION Turn off power prior to connecting to or removing connections from any terminals to avoid electrical shock or equipment damage. Fig. 6. W7763 construction in inches (mm) r93 8

11 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Controller Performance Specifications Power Supply: 4 Vac ± %, -5%, 5/6 Hz. Fan Coil Unit Controller Object #8 Hardware Output Operating Temperature: 3 to F ( to 5 C). nv nvispacetemp SNVT_temp_p nv3 nvoheatoutput SNVT_lev_percent Shipping/Storage Temperature: -4 to 58 F (-4 to 7 C). Relative Humidity: 5% to 95% noncondensing nv nvisetpoint SNVT_temp_p Mandatory Network Variables nv4 nv5 nvocooloutput SNVT_lev_percent nvofanspeed SNVT_switch Inputs: Temperature Sensors: k ohm NTC nv6 nvifanspeedcmd SNVT_switch nv nvoterminalload SNVT_lev_percent Setpoint Potentiometer: k ohm nv7 nviocccmd SNVT_occupancy nv nvoloadabs SNVT_power Digital Input: Closed 4 ohms (.5 ma) Open k ohms (4.8 V) nv8 nviapplicmode SNVT_hvac_mode nv3 nvodischairtemp SNVT_temp_p Humidity Sensor: to Vdc Outputs: Triac voltage range: 4 Vac ± %. Triac maximum current ratings: 5 ma continuous 65 ma surge for 3 sec. IMPORTANT: When any device is energized by a Triac, the device must be able to sink a minimum of 5 ma. If non- Honeywell motors, actuators, or transducers are to be used with Excel Chilled Ceiling Controllers, compatibility must be verified. nv9 nv nv7 nv8 nvisetptoffset SNVT_temp_p nviwatertemp SNVT_temp_p nvidischairtemp SNVT_temp_p nvienergyholdoff SNVT_switch Optional Network Variables nv4 nv5 nv6 nv9 nv nvoreheat SNVT_switch nvospacetemp SNVT_temp_p nvoeffectsetpt SNVT_temp_p nvoeffectocc SNVT_occupancy nvoenergyholdoff SNVT_switch nvounitstatus nv SNVT_hvac_status Interoperability The W7763 Controllers use the Echelon Bus LonTalk protocol. They support the LONMARK Functional Profile # 8 Fan Coil Unit Controller, version.. Fig. 7 shows the implementation used. Configuration Properties nc49 - ncisndhrtbt nc5 - nciminouttm nc48 - ncircvhrtbt nc7 - ncilocation nc6 - ncisetpnts nc59 - ncinumvalve nc7 - ncidevicename SNVT_time_sec SNVT_time_sec SNVT_time_sec SNVT_str_asc SNVT_temp_setpt SNVT_count SNVT_str_asc mandatory optional optional optional mandatory optional mandatory nvisensorocc SNVT_Occupancy nviemerg SNVT_hvac_emerg nvireheatrelay SNVT_switch Manufacturer- Defined Section nvosensorocc SNVT_Occupancy nvodigitinstate SNVT_switch NOT SUPPORTED. Hardware Input Fig. 7. LONMARK Fan Coil Unit object profile r93

12 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Configurations General The following sections provide an overview of the Excel Chilled Ceiling Controller options related to inputs and outputs. See Application Step 6. Plug-Ins Configuration Screens for a complete list of configuration options and defaults. Table 6. Hardware options summary. option possible configurations Chilled Ceiling system type two-pipe four-pipe Heating actuator type floating floating-mid (one for heat/cool) one-stage two-stage three-stage PWM thermal Cooling actuator type floating floating-mid (one for heat/cool) one-stage two-stage three-stage PWM thermal Digital input not used window closed occupied sensor cool changeover movement window open unoccupied sensor heat changeover input no movement Analog input not used chilled water temperature Analog input 3 not used humidity Wall module option local shared Space temperature sensor none type NTC non-linearized NOTE: The floating-mid option is only for changeover applications and uses only one of the two outputs. Type of Heating and Cooling Equipment W7763 controllers can operate with either two-pipe or fourpipe systems. A two-pipe system requires a changeover input to the controller (hardware or network input). W7763 controllers can operate with a variety of actuators for heating and cooling equipment. Floating actuators can be used which will require specifying the valve run time during configuration of the controller. Valve action can be configured as either direct or reverse. When in a two-pipe system with a changeover input, a floating actuator can be used which has the middle position (5%) as the zero energy position. The cool range is then to 5% and the heat range 5 to %. The output must configured as floating-mid. Multi-stage systems can be controlled with up to three different stages of heating/cooling control. Switching levels are specified in % of control level (see Fig. 8) as is a hysteresis setting which applies to all switching levels. Heating and Cooling switching levels and hysteresis are specified separately. Minimum off times can be configured, and a minimum on time can also be configured. PWM electronic valves and thermal actuators can also be connected and can be configured as either direct or reverse action. The cycle time must be specified during configuration. For PWM valves the zero and full positions must also be configured. HEATING / COOLING STAGES STAGE 3 STAGE STAGE % SWITCHING LEVEL (5%) HYSTERESIS SWITCHING LEVEL (5%) SWITCHING LEVEL 3 (75%) CONTROL % DEMAND Fig. 8. Three-stage heating/cooling switching (defaults for switching levels and hysteresis shown). Digital Input There is a single digital input to the W7763 Controller which may be configured to accommodate an occupancy sensor, a window open/closed contact, a condensation detector, or a changeover input. It is possible to configure the input for either normally-open or normally-closed contacts for any of the switches. Choose the option which corresponds to the condition of a closed contact (input high). The control algorithm in the Chilled Ceiling Controller uses the Occupancy Sensor, if configured, to determine the Effective Occupancy mode of operation(see Table 3). If the Time Of Day (TOD) schedule indicates an Occupied state, and the Occupancy Sensor contact is closed, the Effective Occupancy mode will be Occupied. However, if the TOD schedule indicates an Occupied state and the Occupancy Sensor contact is open, then the Effective Occupancy mode will be Standby. The flow control algorithm will then control to the Standby Cooling and Heating Setpoints. Configuring the digital input for movement or no movement (dependent upon normally-open or normally-closed contacts) adds a delay of 5 minutes to the occupancy sensor such that the space is considered occupied until 5 minutes has elapsed since the last movement is detected. If the digital input is configured as a window open/closed contact, heating and cooling control will be disabled while the window is detected open. Frost protection will be in effect, however, and heating control will be enabled if the temperature drops below 46 F (8 C). A set of contacts may be wired in series for multiple windows r93

13 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE When configured for a condensation switch, the controller will close the cooling valve when condensation is detected. The input may also be configured for changeover for a twopipe system. The input can accommodate a switch that is closed for heating and open for cooling or open for heating and closed for cooling. NOTE: The Excel Chilled Ceiling Controller has limited power available (only.5 ma/4.8 V) for checking the digital input for contact closures. Ensure that contacts used remain within the specified resistance tolerance range (closed 4) even when aged. Excel Wall Module Options A typical Chilled Ceiling installation requires an Excel wall module containing a k ohm NTC room temperature sensor and additional features depending on the wall module type (see Excel wall module literature for further information). The W7763C Chilled Ceiling Controller has the following features built-in and requires no external wall module: setpoint adjustment bypass button status LED a LONWORKS network access jack The W7763D has a setpoint knob and LONWORKS jack but may require a wall module for temperature sensing and bypass button/led functions. The W7763E Controller has only the LONWORKS jack and would normally require a wall module. The Chilled Ceiling Controller can be configured to use a return air sensor rather than the sensor in the controller or wall module. Setpoint adjustments can be configured as relative or absolute, and upper and lower limits can be set. The bypass button can be configured to override the control mode to occupied for a configurable bypass time and to override the control mode indefinitely to unoccupied or it may be configured to only override to occupied. The button may also be used to cancel the override. Common Temperature Control (Master/Slave Controllers) When one or more Chilled Ceiling Controllers serve a common area and a single temperature sensor is to be used, a master/slave arrangement can be configured. One Excel Chilled Ceiling Controller is configured for the local wall module with the desired options. The other Excel Chilled Ceiling Controller(s) will be configured without wall modules and with certain network variables bound with the master controller. Refer to Appendix B of this document for more details. IMPORTANT The slave units must have the same HVAC equipment connected to it as the master units. The slave units will not use any internal temperature setpoints or control algorithms. The master controller determines heating/cooling output based upon setpoints and occupancy and command mode status and communicates this to the slave via the network. See Appendix B, Configuring for Master/Slave Operation, for more information, IMPORTANT Wall modules with fan speed switches must not be used with W7763 Chilled Ceiling Controllers r93

14 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Abbreviations and Definitions Echelon - The company that developed the LONWORKS network and the Neuron chips used to communicate on the LONWORKS network. EMI - Electromagnetic Interference; electrical noise that can cause problems with communications signals. EMS - Energy Management System; refers to the controllers and algorithms responsible for calculating optimum operational parameters for maximum energy savings in the building. EEPROM - Electrically Erasable Programmable Read Only Memory; the variable storage area for saving user Setpoint values and factory calibration information. EPROM - Erasable Programmable Read Only Memory; the firmware that contains the control algorithms for the Excel Chilled Ceiling Controller. Firmware - Software stored in a nonvolatile memory medium such as an EPROM. I/O - Input/Output; the physical sensors and actuators connected to a controller. I x R - I times R or current times resistance; refers to Ohms Law: V = I x R. K - Degrees Kelvin. LonWorks Segment - A LONWORKS section containing no more than 6 nodes. Two segments can be joined together using a router. NEC - National Electrical Code; the body of standards for safe field-wiring practices. NEMA - National Electrical Manufacturers Association; the standards developed by an organization of companies for safe field wiring practices. NV - Network Variable; an Excel Controller parameter that can be viewed or modified over the LONWORKS network. OEM - Original Equipment Manufacturer; the company that builds the fan coil units. PC - Personal Computer. Pot - Potentiometer; a variable resistance electronic component located on Excel wall modules. Used to allow user-adjusted Setpoints to be input into the Excel Chilled Ceiling Controller. TOD - Time-Of-Day; the scheduling of Occupied and Unoccupied times of operation. VA - Volt-Amperes; a measure of electrical power output or consumption as applicable to an ac device. Vac - Voltage alternating current; ac voltage as opposed to dc voltage. LNS LON Network Service r93

15 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE APPLICATION STEPS Overview Steps one through seven, see Table 7, address considerations for engineering an Excel Chilled Ceiling System. These steps are guidelines intended to aid understanding of the product I/O options, bus arrangement choices, configuration options and the Excel Chilled Ceiling Controllers role. NOTEBOOK PC USING LNS TOOL RS-3 SERIAL PORT SLTA SHIELDED INTERFACE CABLE CHILLED CEILING CONTROLLER Table 7. Application steps. step no. description Plan the System Determine Other Bus Devices Required 3 Lay out Communication and Power Wiring 4 Prepare Wiring Diagrams 5 Order Equipment 6 Plug-Ins Configuration Screens 7 Troubleshooting Step. Plan the System Plan the use of the W7763 Controllers according to the job requirements. Determine the location, functionality and sensor or actuator usage. Verify the sales estimate of the number of W7763 Controllers and wall modules required for each model type. Also check the number and type of output actuators and other accessories required. When planning the system layout, consider potential expansion possibilities to allow for future growth. Planning is very important to be prepared for adding HVAC systems and controllers in future projects. LONWORKS PORT Fig. 9. Connecting the portable operator terminal to the LonWorks network. The LONWORKS communication loop between controllers must be laid out according to the guidelines applicable for that topology. Chilled Ceiling Controllers use FTT technology that allows daisy chain, star, loop or combinations of these bus configurations. See Application Step 3. Lay Out Communications and Power Wiring, for more information on bus wiring layout, and see Fig., Fig., and Fig. in Application Step 4. Prepare Wiring Diagrams, for wiring details. It is important to understand the interrelationships between controllers on the LONWORKS network early in the job engineering process to ensure their implementation when configuring the controllers. (See Application Step 6. Plug-Ins Configuration Screens, for information on the various Excel Chilled Ceiling Controller parameters and on Excel Chilled Ceiling Controller point mapping). The T777 Wall Modules can be installed only as I/O devices, or additional wiring can be run to them for the LONWORKS network. It must be determined and documented prior to installation which T777 Wall Modules will have their LONWORKS network jacks connected. Step. Determine Other Bus Devices Required A maximum of 6 nodes can communicate on a single LONWORKS segment. If more nodes are required, a router is necessary. Using a router allows up to 5 nodes, divided between two LONWORKS segments. The router accounts for two of these nodes (one node on each side of the router). Table 8. LonWorks configuration rules and device node numbers. One LonWorks Segment Example Maximum Number of Nodes Equals 6 Maximum number of Excel Controllers 6 nodes (T746/T756/T777 wall modules are not LONWORKS nodes) Total 6 nodes Two LonWorks Segments Example Maximum Number of Nodes Equals 5 Maximum number of Excel Controllers in segment number one 6 nodes (T746/T756/T777 wall modules are not LONWORKS nodes) Maximum number of Excel Controllers in segment number two 6 nodes (T746/T756/T777 wall modules are not LONWORKS nodes) Total 5 nodes r93

16 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE The maximum length of a FTT LONWORKS segment is 46 ft (4 m) for a daisy chain configuration or 65 ft (5 m) total wire length and (4 m) node-to-node for any other type of configuration. NOTE: For FTT LONWORKS segments the distance from each transceiver to all other transceivers and to the termination must not exceed the maximum node-tonode distance. If multiple paths exist, the longest one should be used for the calculation. If longer runs are required, add a Router to partition the system into two segments. In addition, all LONWORKS segments require the installation of a Bus Termination Module. For a FTT LONWORKS segment, one or two Termination Modules may be required depending upon the bus configuration. See Application Step 3. Lay Out Communications and Power Wiring, and the LONWORKS Termination Module subsection in Application Step 4 for more details. encoding. Wire the LONWORKS network using level IV AWG or plenum rated level IV AWG nonshielded, twisted pair, solid conductor wire as the recommended wire size (see Table for part numbers). A FTT LONWORKS can be wired in daisy chain, star, loop or any combination thereof as long as the maximum wire length requirements given in Step are met. NOTE: Due to the transformer isolation, the bus wiring does not have a polarity; that is, it is not important which of the two LONWORKS terminals are connected to each wire of the twisted pair. LONWORKS networks can be configured in a variety of ways, but the rules listed in Table 8 always apply. Fig. and Fig. depict two typical daisy chain LONWORKS network layouts; one as a single bus segment that has 6 nodes or less, and one showing two segments. Fig. shows examples of free topology bus layouts using -series devices. The bus configuration is set up using the Network Manager tool. Step 3. Lay Out Communications and Power Wiring LonWorks Layout The communications bus, LONWORKS, is a 78-kilobit serial link that uses transformer isolation and differential Manchester W7763 CHILLED CEILING CONTROLLER W7763 CHILLED CEILING CONTROLLER 9 9 XAL Term Fig.. LonWorks wiring layout for one daisy-chain network segment r93 4

17 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE W7763 CHILLED CEILING CONTROLLER W7763 CHILLED CEILING CONTROLLER 9 9 W7763 CHILLED CEILING CONTROLLER W7763 CHILLED CEILING CONTROLLER LonWorks ROUTER 9 9 XAL Term XAL Term UP TO MAX. 6 NODES XAL Term Fig.. LonWorks wiring layout for two daisy-chain network segments. Fig.. Free topology LonWorks layout examples. NOTE: See the LONWORKS Termination Module section for additional details. IMPORTANT Notes on Communications Wiring: Do not use different wire types or gauges on the same LonWorks segment. The step change in line impedance characteristics would cause unpredictable reflections on the bus. When using different types is unavoidable, use a Q775A Router at the junction. All field wiring must conform to local codes and ordinances r93

18 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Power Wiring Do not use shielded cable for LonWorks wiring runs. The higher capacitance of the shielded cable will cause degradation of communications throughput. In noisy (high EMI) environments, avoid wire runs parallel to noisy power cables, or lines containing lighting dimmer switches, and keep at least 3 in. (76 mm) of separation between noisy lines and the LonWorks cable. Make sure that neither of the LonWorks wires is grounded. A power budget must be calculated for each Excel W7763 Controller to determine the required transformer size for proper operation. A power budget is simply the summing of the maximum power draw ratings (in VA) of all the devices to be controlled by an Excel W7763 Controller. This includes the controller itself, the equipment and various contactors and transducers, as appropriate, for the Excel configuration. Power Budget Calculation Example The following is an example power budget calculation for a typical W7763 Excel Chilled Ceiling Controller. Assume a W7763 unit with a thermal actuator for cooling control and an electric actuator for heating. The power requirements are listed in Table 9. Table 9. Power requirements device VA information from W7763C,D,E.5 W7763 Specification Data ZA Thermal actuator. Product Data M74A Electric Actuator.7 Product Data TOTAL 3. The Excel System example requires 3. VA of peak power; therefore, a 48 VA CRT ( VA ATA for US) Transformer is able to provide ample power for this controller and its accessories. Table. VA Ratings for transformer sizing device description VA W7763C,D,E Excel Chilled Ceiling Controller.5 T756A DWM. ZA Thermal actuator. M74A Electric actuator.7 For contactors and similar devices, the in-rush power ratings should be used as the worst case values when performing power budget calculations. Also, the application engineer must consider the possible combinations of simultaneously energized outputs and calculate the VA ratings accordingly. The worst case, that uses the largest possible VA load, should be determined when sizing the transformer. Line Loss Excel Controllers must receive a minimum supply voltage of Vac. If long power or output wire runs are required, a voltage drop due to Ohms Law (I x R) line loss must be considered. This line loss can result in a significant increase in total power required and thereby affect transformer sizing. The following example is an I x R line-loss calculation for a ft (6m) run from a transformer to a W775 CVAHU Controller drawing 37 VA using two 8 AWG (. mm ) wires. The formula is: Loss = [length of round-trip wire run (ft)] x [resistance in wire (ohms per ft)] x [current in wire (amperes)] From specification data: 8 AWG twisted pair wire has 6.38 ohms per feet. Loss = [(4 ft) x (6.38/ ohms per ft)] x [(37 VA)/(4V)] = 4. volts This means that four volts are going to be lost between the transformer and the controller; therefore, to assure the controller receives at least volts, the transformer must output more than 4 volts. Because all transformer output voltage levels depend on the size of the connected load, a larger transformer outputs a higher voltage than a smaller one for a given load. Fig. 3 shows this voltage load dependence. In the preceding I x R loss example, even though the controller load is only 37 VA, a standard 4 VA transformer is not sufficient due to the line loss. From Fig. 3, a 4 VA transformer is just under percent loaded (for the 37 VA controller) and, therefore, has a secondary voltage of.9 volts. (Use the lower edge of the shaded zone in Fig. 3 that represents the worst case conditions.) When the I x R loss of four volts is subtracted, only 8.9 volts reaches the controller, which is not enough voltage for proper operation. In this situation, the engineer basically has three alternatives:. Use a larger transformer; for example, if an 8 VA model is used, see Fig. 3, an output of 4.4 volts minus the four volt line loss supplies.4 volts to the controller. Although acceptable, the four-volt line-loss in this example is higher than recommended. See the following IMPORTANT.. Use heavier gauge wire for the power run. 4 AWG (. mm ) wire has a resistance of.57 ohms per ft which, using the preceding formula, gives a line-loss of only.58 volts (compared with 4. volts). This would allow a 4 VA transformer to be used. 4 AWG (. mm ) wire is the recommended wire size for 4 Vac wiring. 3. Locate the transformer closer to the controller, thereby reducing the length of the wire run, and the line loss. The issue of line-loss is also important in the case of the output wiring connected to the Triac digital outputs. The same formula and method are used. The rule to remember is to keep all power and output wire runs as short as practical. When necessary, use heavier gauge wire, a bigger transformer, or install the transformer closer to the controller. IMPORTANT No installation should be designed where the line loss is greater than two volts to allow for nominal operation if the primary voltage drops to Vac ( Vac minus 5%) or 93 Vac (3 minus 5%). To meet the National Electrical Manufacturers Association (NEMA) standards, a transformer must stay within the NEMA limits. The chart in Fig. 3 shows the required limits at various loads. With percent load, the transformer secondary must supply between 3 and 5 volts to meet the NEMA standard r93 6

19 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE When a purchased transformer meets the NEMA standard DC-986, the transformer voltage-regulating ability can be considered reliable. Compliance with the NEMA standard is voluntary. The following Honeywell transformers meet this NEMA standard: Transformer Type VA Rating ATA AT4A 4 AT7D 4 AT87A 5 AK33 Assembly IMPORTANT (US ONLY) If the W7763 Controller is used on Heating and Cooling Equipment (UL 995) devices and the transformer primary power is more than 5 volts, connect the transformer secondary to earth ground, see Fig. 4. SECONDARY VOLTAGE % OF LOAD M993 Fig. 3 NEMA class transformer voltage output limits. IMPORTANT Notes on power wiring: All field wiring must conform to local codes and ordinances or as specified on installation wiring diagrams. To maintain NEC Class and UL ratings, the installation must use transformers of VA or less capacity. For multiple controllers operating from a single transformer, the same side of the transformer secondary must be connected to the same input terminal in each controller. For the W7763 Controller (which has Triac outputs), all output devices must be powered from the same transformer as the one powering the W7763 Controller. Use the heaviest gauge wire available, up to 4 AWG (. mm ) with a minimum of 8 AWG (. mm ) for all power and earth ground connections. To minimize EMI noise, do not run Triac and/or relay output wires in the same conduit as the input wires or the LonWorks communications wiring. Unswitched 4 Vac power wiring can be run in the same conduit as the LonWorks cable. Step 4. Prepare Wiring Diagrams General Considerations The purpose of this step is to assist the application engineer in developing job drawings to meet job specifications. Wiring details for the W7763 Chilled Ceiling Controller are shown in Fig. 4. Table gives additional details for output connections. NOTE: For field wiring, when two or more wires are to be attached to the same connector block terminal, be sure to twist them together. Deviation from this rule can result in improper electrical contact. See Fig. 5. Table lists wiring types, sizes, and length restrictions for Excel Chilled Ceiling Controller products. If the W7763 Controller is used in UL 995 equipment and the primary power is more than 5 Vac, ground one side of the transformer. Fig. 4 Power wiring details for one Excel per transformer. Table. Field wiring reference table (US part numbers shown) r93

20 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Wire Function LonWorks (Plenum) LonWorks (Nonplenum)* Input Wiring Sensors Contacts Output Wiring Actuators Relays Power Wiring Recommended Minimum Wire Size AWG Construction (mm ) AWG Twisted pair solid conductor, nonshielded. AWG Twisted pair solid conductor, nonshielded. 4 to AWG (. to.5 mm ) 4 AWG (.5 mm ) (8 AWG (. mm ) acceptable for short runs) 4 AWG (.5 mm ) Multiconductor (usually fivewire cable bundle). For runs > ft (3 m) twisted pair or shielded cable is recommended. Any pair nonshielded (use heavier wire for longer runs). Any pair nonshielded (use heavier wire for longer runs). Specification or Requirement Level IV 4 F (6 C) rating Level IV 4 F (6 C) rating 4 F (6 C) rating NEC Class 4 F (6 C) rating NEC Class 4 F (6 C) rating NOTE: PVC wire must not be used where prohibited by local fire regulations. Vendor Wire Type Honeywell (US) AK379 (one twisted pair) AK379 (two twisted pairs) (Europe: Belden 9H54) Honeywell (US) AK378 (one twisted pair) AK378 (two twisted pairs) (Europe: Belden 9D5) Standard thermostat wire Honeywell (US) AK37 (8 AWG) AK37 (6 AWG) AK3754 (4 AWG) or equivalent Honeywell (US) AK3754 (4 AWG) (twisted pair) AK399 (4 AWG) single conductor or equivalent Maximum Length ft (m) See Step See Step 8.5 ft (5m) ft (6m) Limited by line loss effects on power consumption. (See Line Loss subsection.) W7763 Controller Fig. 6 illustrates W7763 Controller terminal block assignments and wiring for a sample Chilled Ceiling installation. All connections are made at terminal blocks. Table lists wiring information for wiring all of the possible actuator types.. STRIP / IN. (3 MM) FROM WIRES TO BE ATTACHED AT ONE TERMAINAL. TWIST WIRES TOGETHER WITH PLIERS (A MINIMUM OF THREE TURNS). Fig. 5. Attaching two or more wires at terminal blocks. 3. CUT TWISTED END OF WIRES TO 3/6 IN. (5 MM) BEFORE INSERTING INTO TERMINAL AND TIGHTENING SCREW. THEN PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION r93 8

21 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE OCCUPANCY SENSOR CHANGEOVER CONTACT AIRFLOW CONTACT WINDOW CONTACT MOTION SENSOR 4 VAC 4 VAC CHILLED COM WATER TEMP T756B connection to W DWM T756B 6 with 5 integrated 4 humidity 3 sensor W7763 Chilled Ceiling Controller WALL MODULE CONNECTIONS HUMIDITY 4 VAC -V W7763 CHILLED CEILING CONTROLLER INPUT 3 COM,3 INPUT INPUT COM LED BYPASS SETPT SENSOR GND 4 VAC 4 VAC COM OUT COM OUT OPEN OUT CLOSE OUT COM OUT OPEN OUT CLOSE E-BUS (LON) E-BUS (LON) Wall module setpoint connection for W7763E only. 4 VAC 4 VAC COM COM OPEN CLOSE Wall module bypass and LED connections for W7763D and E only. Fig. 6. W7763 Chilled Ceiling Controller wiring example. Table. Output assignments for various actuator types. Output type Out Terminal Out Terminal Floating 4 Vac open close 4 Vac open close -stage 4 Vac on/off 4 Vac on/off -stage 4 Vac stage stage 4 Vac stage stage 3-stage 4 Vac stage stage 4 Vac stage stage stage 3 stage 3 PWM 4 Vac PWM 4 Vac PWM Thermal 4 Vac on/off 4 Vac on/off HEAT + COM OPEN CLOSE LONWORKS NETWORK IN /4 VAC COOL - LONWORKS NETWORK OUT LonWorks Termination Module One or two LONWORKS Termination Modules, part no. XAL Term, are required for a LONWORKS network with FTT devices on it, depending upon the configuration. Double termination is only required when the network is a daisy-chain configuration and the total wire length is greater than 64 ft (5 m). The maximum lengths described in Step must be adhered to for either a daisy chain or free topology LonWorks layout. REMOVABLE SCREW-TYPE 3-POLE TERMINAL BLOCK SHIELD PLUG-IN JUMPER SHIELD FTT/LPT BUS TOPOLOGY; R: 5 Ohm FTT/LPT FREE TOPOLOGY; R: 5.3 Ohm PARK POSITION; NO TERMINATION FREE TOPOLOGY: 5.3 Ohm LON TERMINATION BUS TOPOLOGY: 5 Ohm μ μ 5.3 Ohm 5 Ohm μ μ Fig. 7. XAL-Term Connection and Termination Module r93

22 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Step 5. Order Equipment After compiling a bill of materials through completion of the previous application steps, refer to Table 3 for ordering information. Contact Honeywell for information about Controllers and Wall Modules with no logo. Table 3. Excel Chilled Ceiling Controller ordering information. part no. product description comments Excel Chilled Ceiling Controllers W7763C6 with setpoint knob, temp. sensor, bypass F absolute W7763C4 with setpoint knob, temp. sensor, bypass C absolute W7763C3 with setpoint knob, temp. sensor, bypass +/- relative W7763D4 with setpoint knob, bypass F absolute W7763D with setpoint knob, bypass C absolute W7763D3 with setpoint knob, bypass +/- relative W7763E3 T746 T756 T777 no setpoint knob, sensor, or bypass Excel Wall Modules See Excel wall module literature for details. Excel Sensors C768A7 (Europe) Air Temperature Sensor Return air Echelon-Based Components and Parts Q775A (US) FTT LonWorks Router (UK) Order from local Echelon supplier (Europe) (Europe) Q775A (US) FTT LonWorks Serial Interface (SLTA) (UK) Order from local Echelon supplier (Europe) (Europe) Termination Module, part no. Two required per LonWorks segment. 954B 5979A (US only) SLTA Connector Cable for LonWorks Serial interface to wall module or controller. Cabling Serial Interface Cable, male DB-9 to female DB-9 Obtain locally from any computer hardware Honeywell (US) AK379 (one twisted pair) AK379 (two twisted pairs) Belden 9H54 (Europe) Honeywell (US) AK378 (one twisted pair) AK378 (two twisted pairs) Belden 9D5 (Europe) or female DB-5. LonWorks (plenum): AWG twisted pair solid conductor, nonshielded. LonWorks (non-plenum): AWG twisted pair solid conductor, nonshielded. vendor. Level IV 4 F (6 C) rating Level IV 4 F (6 C) rating Honeywell (US) AK375 Inputs: 8 AWG (. mm ) five wire cable bundle. Standard thermostat wire Honeywell (US) AK375 Outputs/Power: 4 to 8 AWG (.5 to. mm ). NEC Class 4 F (6 C) rating (typical or equivalent) Honeywell (US) AK37 8 AWG (. mm ) twisted pair. Non-plenum (typical or equivalent) Honeywell (US) AK37 6 AWG (.5 mm ) twisted pair. Non-plenum (typical or equivalent) Honeywell (US) AK3754 (typical or equivalent) 4 AWG (.5 mm ) two conductor. Non-plenum r93

23 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Step 6. Plug-Ins Configuration Screens General This section will provide details on the configuration options for W7763 Controllers. See Appendix C for reference information. Using Plug-Ins The configuration process is primarily performed in a series of screens seen as file tabs under the menu option Application Selection and is easily followed using the tables included in this section. There are 8 file tabs: The specific parameters to be configured in each of these four categories are tabulated in the following subsections. For a complete list of all Excel Chilled Ceiling Controller NV s, see Appendix C. Output Input Equipment Control Switching Levels Zone Options Miscellaneous PID Wiring (information only, no configuring) r93

24 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Output The available options for output configurations with the default values shown are listed in Table 4. See Control Provided and Configurations sections above for more information about parameters. Table 4. Chilled Ceiling Controller output configuration options. function configuration options default Safety System type Output (triac and ) control Output (triac and ) type Output (triac 3 and 4) control ceiling protection (enables dewpoint calculation and condensation protection). no ceiling protection (condensation switch input may still be used for protection) two pipe ( valve) four pipe ( valves) not used cooling heating heat/cool changeover floating floating-mid 3 -stage -stage 3-stage PWM thermal not used cooling heating heat/cool changeover ceiling protection four pipe heating floating cooling Output (triac 3 and 4) type floating floating floating-mid 3 -stage -stage 3-stage PWM thermal NOTES:. Humidity and chilled water temperature inputs are required. If no humidity input is available, the configured dewpoint (see Zone Options) is used instead of a calculated value.. The output mode settings only apply to a 4-pipe system. In a -pipe system output will always operate in changeover mode. 3. The floating-mid option is only for changeover applications and uses only one of the two outputs. The operation of the triacs based upon the output type is given in Table r93

25 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Input The available options for input configurations with the default values shown are listed in Table 5. Temperature sensor settings may apply to either the built-in sensor (W7763C), remote wall module (for W7763D, E controllers), or a sensor connected directly to the controller. Override button settings may apply to either the built-in button (W7763C) or remote wall module button (for W7763D, E controllers). Setpoint knob settings may apply to the built-in setpoint knob (W7763C, D) or remote wall module (for W7763E controllers). See Control Provided and Configurations section above for more information on parameters. Table 5. Chilled Ceiling Controller input configuration options. function configuration options default Space temperature sensor Bypass button LED/LCD Setpoint knob Minimum limit setpoint pot Maximum limit setpoint pot Digital input Analog input no sensor sensor none - bypass button is disabled. bypass unoccupied - bypass button overrides current mode to occupied for configurable bypass time for button press of. to 4 seconds (single press with T756) or permanently overrides to unoccupied for button press of 4. to 7 seconds (more than 5 seconds with T756). bypass - bypass button only overrides current mode to occupied and to cancel the override again. LED override - shows override from bypass button or from network. LED occupancy - shows effective occupancy mode. LCD display - only used with T756 Wall Modules; occupancy mode is represented by different symbols. no knob relative absolute middle limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86 F) or DDF (relative setpoint, -9 to 9 DDF) (limit for setpoint knob in either degrees C (absolute setpoint, to 3 C) or K (relative setpoint, -5 to 5 K)) limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86 F) or DDF (relative setpoint, -9 to 9 DDF) (limit for setpoint knob in either degrees C (absolute setpoint, to 3 C) or K (relative setpoint, -5 to 5 K)) not used window closed window open occupied sensor unoccupied sensor cool changeover heat changeover condensation no condensation movement no movement cold water not used sensor bypass unoccupied LED override relative -9 DDF (53.6 F for absolute setpoint) (-5 K ( C for absolute setpoint)) 9 DDF (86 F for absolute setpoint) (5 K (3 C for absolute setpoint)) not used not used Analog input 3 humidity not used not used NOTES:. The temperature sensor option no sensor requires that either the Chilled Ceiling controller be configured as a slave unit receiving heating and cooling control levels from the master unit via the network, or that it receive temperature information over the network from another device.. The digital input option to be selected is the condition in which the input will be high (switch contact closed) r93

26 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Equipment Control The available options for equipment control configurations with the default values shown are listed in the following tables. See Configurations section above for more information on parameters. Table 6. Chilled Ceiling Controller equipment control configuration options. function configuration options default Output valve direction Output valve direction direct reverse direct reverse Output minimum stage off time to 6 seconds 9 s Output minimum stage off time to 6 seconds 9 s Output valve run time/pwm period/minimum stage on time Output valve run time/pwm period/minimum stage on time floating/floating-mid - valve run time ( to 6 seconds) PWM - cycle time ( to 6 seconds),, and 3-stage - minimum on time ( to seconds) floating/floating-mid - valve run time ( to 6 seconds) PWM - cycle time ( to 6 seconds),, and 3-stage - minimum on time ( to seconds) PWM zero position to % % direct direct 5 s 5 s PWM full position to % % NOTES:. Valve action settings apply to floating, PWM, or thermal types.. Settings apply to both actuators if both are PWM. Switching Levels The available options for switching level configurations with the default values shown are listed in the following tables. See Configurations section above for more information on parameters. Table 7. Chilled Ceiling Controller Heating/Cooling stages configuration options. Function Configuration options Default Cooling stage switching level to % 5% Heating stage switching level to % 5% Cooling stage switching level to % 5% Heating stage switching level to % 5% Cooling stage 3 switching level to % 75% Heating stage 3 switching level to % 75% Cooling hysteresis to %, % Heating hysteresis to % % r93 4

27 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE Zone Options The available options for input configurations with the default values shown are listed in the following tables. See Control Provided and Configurations sections above for more information on parameters. Table 8. Chilled Ceiling Controller zone configuration options. function configuration options default Cooling occupied setpoint, 5 to 95 F ( to 35 C) 73.4 F (3 C) Heating occupied setpoint, 5 to 95 F ( to 35 C) 69.8 F ( C) Cooling standby setpoint, 5 to 95 F ( to 35 C) 77 F (5 C) Heating standby setpoint, 5 to 95 F ( to 35 C) 66. F (9 C) Cooling unoccupied setpoint, 5 to 95 F ( to 35 C) 8.4 F (8 C) Heating unoccupied setpoint, 5 to 95 F ( to 35 C) 6.8 F (6 C) Dewpoint setpoint 5 to 95 F ( to 35 C) 95 F (35 C) Dewpoint safety.8 to 7. DDF ( to 4 K).8 DDF ( K) NOTES:. Default setpoints are used when there is no setpoint knob and no network setpoint input.. Ensure that unoccupied heating<occupied heating<occupied cooling<unoccupied cooling and standby heating<standby cooling. Miscellaneous The available options for the Miscellaneous tab in the Plug-Ins are listed in the following tables. See Control Provided and Configurations sections above for more information on parameters. Table 9. Chilled Ceiling Controller miscellaneous configuration options. function configuration options default Bypass time to 8 minutes 8 minutes Override priority last wins - the last command from either the wall module or from the network has priority. network wins - a network command always has priority until canceled. Demand limit control bump to K K Cool rec ramp (Cooling optimum start gradient) Heat rec ramp (Heating optimum start gradient) - to K/hour to K/hour Last wins r93

28 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE PID The available options for configuring the PID parameters with the default values shown are listed in the following tables. See Control Provided section above for more information on parameters. Table. Chilled Ceiling Controller PID configuration options. function configuration options default Cooling proportional gain 4 to K ( = disable) 4 K Heating proportional gain 4 to K ( = disable) 4 K Cooling reset time to 3 seconds ( = disable) 3 s Heating reset time to 3 seconds ( = disable) 3 s Cooling derivative time to 3 seconds ( = disable) Heating derivative time to 3 seconds ( = disable) Cooling boost temperature.5 to K ( = disable) K Heating boost temperature.5 to K ( = disable) K NOTES:. With version.. and later firmware, it is possible to configure the proportional gain as low as for PI control or.5 for P control. Commissioning Commissioning refers to the activities performed to optimize the Chilled Ceiling operation to meet the job specification requirements and overall fine-tuning of the Chilled Ceiling control. Any LNS tool can be used to perform these activities, as described in Appendix B. ID Number Each Excel Chilled Ceiling Controller is shipped with an internal Identification Number from the factory called the Neuron ID. This ID number is on a removable sticker on the side of the W7763 housing and is required for identifying the controller on the LonWorks network through the LNS tool. The ID number can either be manually entered or it can be received from the network. Pressing the bypass push-button on the wall module for a Chilled Ceiling Controller or on the controller itself causes it to broadcast a service message containing its Neuron ID number r93 6

29 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE Step 7. Troubleshooting Troubleshooting Excel Chilled Ceiling Controllers and Wall Modules In addition to the following information, refer to the various Checkout and Test manuals for these products. See Applicable Literature section for form numbers. Alarms When an Excel Chilled Ceiling Controller has an alarm condition, it reports it to the central node on the LonWorks network via the variable nvoalarm. See Table. The information contained in nvoalarm is: Subnet Number: The LonWorks subnet that contains the Excel Chilled Ceiling Controller node that has the alarm condition. Node Number: The Excel Chilled Ceiling Controller node that has the alarm condition. Alarm Type: The specific alarm being issued and return to normal. An Excel Chilled Ceiling Controller can provide the alarm types listed in Table. All current alarms are contained in a variable called nvoalarmstatus (User Addresses SrcAlarmStatus, SrcAlarmStatus, and SrcAlarmStatus3) which is composed of three bytes (nvoalarmstatus.alarm_bit[n] with n = through ) with a bit corresponding to each of the alarms listed in Table. The coding is ordered in that the least significant bit of nvoalarmstatus.alarm_bit[] corresponding to alarm type, the most significant bit corresponding to alarm type 8, the least significant bit of nvoalarmstatus.alarm_bit[] corresponding to alarm type 9, and so on. Even alarms that are suppressed in nvoalarm (see below) are contained in nvoalarmstatus. Also, the Excel Chilled Ceiling Controller variables, nvoalarmlog.type[n], where n is through 4, that store the last five alarms to occur in the controller, are available. Certain alarm conditions are suppressed conditionally as follows: If an input network variable with failure detect is bound to the same node as nvoalarm, then nvoalarm and nvoalarmlog do not report the related Chilled Ceiling Controller variable receive failure error, and its associated return to normal. Suppression only occurs when the nvoalarm is bound to only one node using LONWORKS subnet/node addressing and only after the input variable has actually received a network variable from the node since the latest application restart (or power-up condition) r93

30 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE name of alarm or alarm bit No Alarm/Return to Normal: Table. Excel Chilled Ceiling Controller alarms. alarm type meaning of alarm code or alarm bit no. RETURN_TO_NORMAL 8 Return to no error after being in an error condition. This code is added numerically to another alarm code to indicate that the error condition has returned to normal. ALARM_NOTIFY_DISABLED 55 The alarm reporting has been turned off by the nvimanualmode =SUPPRESS_ALARMS. No more alarms are reported until nvimanualmode turns on alarm reporting or upon application restart. NO_ALARM No errors since last application restart; initial condition Chilled Ceiling Alarms: ALARM_NODE_OFF Control algorithm has stopped due to controller disabled, or in test mode, or other conditions ALARM_FROST The space temperature is below the frost alarm limit. The alarm condition remains until the temperature exceeds the alarm limit plus hysteresis. ALARM_INVALID_SETPOINTS 3 One of the setpoints is not in the valid range ALARM_TEMP_SENSOR 4 Temperature sensor failed ALARM_SETPOINT_KNOB 5 Remote setpoint potentiometer failed ALARM_FD_SPACE_TEMP 8 nvispacetemp is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_APPL_MODE 9 nviapplicmode is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_SETPT_OFFSET nvisetptoffset is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_TOD_EVENT nvitodevent is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_DLC_SHED nvidlcshed is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_HUMIDITY 3 nvispacerh is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_OD_TEMP 4 nviodtemp is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_SENSOR_OCC 5 nvisensorocc is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_WINDOW 6 nvienergyholdoff is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_MAN_HEAT 7 nvimanheat is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_MAN_COOL 8 nvimancool is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME ALARM_FD_COOL_TEMP 9 The software is not compatible with the hardware configuration specified by the hardware configuration resistor value. Compatibility is checked only once after application restart. ALARM_HO_TOO_COOL The chilled water temperature has fallen below the dewpoint plus safety band. This causes the cooling valve to be closed. ALARM_CONDENSATION Condensation has been detected. This causes the cooling valve to be closed r93 8

31 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE Broadcasting the Service Message The Service Message allows a device on the LonWorks network to be positively identified. The Service Message contains the controller Neuron ID number and, therefore, can be used to confirm the physical location of a particular Excel Chilled Ceiling Controller in a building. When an Assign Neuron ID command is issued from the LNS tool, the node goes into the SERVICE_MESSAGE mode for one minute. In the SERVICE_MESSAGE mode, pressing the occupancy override button on the remote wall module causes the Service Message to be broadcast on the network. All other functions are normal in the SERVICE_MESSAGE mode. If an Chilled Ceiling Controller does not have a bypass button connected, press the service pin button on the controller itself, located as shown in the following figure. SERVICE LED W7763 Controller Status LED The LED on the upper right of the controller provides an indication of device status. The LED has the following states:. Off no power to the processor.. Continuous on processor is initialized state. 3. Slow blink controlling, normal state. 4. Fast blink controller in alarm. Manual Mode The Chilled Ceiling Controller can be put into a manual mode that disables the control algorithms and allows manual setting of outputs for system checkout. The variable nvimanualmode must be set to Mode_Manual using the LNS tool. Inputs are read and digital filtering of analog inputs is turned off to speed up settling time. Input network variables are received, and output network variables are sent periodically. Triac outputs can be set to any combination of on/off or can be set to a test position based upon the configured valve runtime/cycle time. The override LED can be commanded on/off in this mode also. E-BUS JACK SERVICE BUTTON Fig. 8. Chilled Ceiling Controller LED and service button r93

32 EXCEL CHILLED CEILING CONTROLLER LNS PLUG-INS - USER GUIDE APPENDIX A: USING A LNS TOOL TO COMMISSION A CHILLED CEILING CONTROLLER Temperature Sensor Calibration The temperature sensor in the Excel wall modules can be calibrated to correct for sensor inaccuracies, wire resistance, etc. This allows the Excel Chilled Ceiling Controller to sense the space temperature with a high degree of accuracy. Procedure Select the controller being worked on with the LNS tool. From within the LNS tool, with the desired Chilled Ceiling plant loaded and the SLTA connected to the LonWorks network, perform the following procedure: 4. The box displays the Current Value of the sensor and the current Offset; it also contains a field for entering the actual Measured Value. When a value is typed in and Calibrate is clicked, the offset value is automatically calculated, displayed, and written to the Excel Chilled Ceiling Controller.. Select a controller symbol from a network diagram.. Click on Monitor from the Controller menu. Once the LNS tool logs on to the controller, the schematic for that Chilled Ceiling is displayed with point values and statuses. 3. Click on Calibrate Point(s)... from the Monitor menu. This pops up the Temperature Calibration dialog box. Fig. 9. Calibration dialog box. NOTE: Record the offset value to be manually restored if additional downloads are performed. 5. Click on Close after completing adjustments r93 3